we want iraqis to feel there is humanity in america. he is happy to be participating. >> there's no paycheck. it's not really safe here, but this is a once in a lifetime opportunity, knowing that you've done something for someone that nobody else has done before. i made a difference in the life of these families. definitely, the sacrifice has been worth it. >>> and now a look back at the stories making headlines this week. >> a source close to the jackson family says jackson's personal doctor administered a powerful drug that authorities believe killed him. >> a source with knowledge of the investigation, someone close to the family, says that dr. conrad murray did, indeed, administer this drug to michael jackson within 24 hours of his death. >> in las vegas, authorities are searching both the home and office of michael jackson's personal doctor, dr. conrad murray was with the singer when he died last month in los angeles. >> it only lasted about three hours and all they took was one computer hard drive, according to murray's attorney,